NCIt definition : A radiotracer composed of an analog of the reversible nitric oxide synthase (NOS)
inhibitor, 2-amino 4-methylpyridine, radiolabeled with fluorine F 18, with potential
imaging activity upon positron emission tomography/computed tomography (PET/CT). Upon
administration of fluorine F 18 NOS, the NOS moiety targets and binds to inducible
NOS (iNOS). Upon PET/CT imaging, iNOS expression and thus the extent of inflammation
can be assessed. iNOS expression is upregulated in a variety of inflammatory diseases
and certain cancers and may invoke a chronic inflammatory state in tumor cells.;